Electrical snow-melting heater.



J. A. BOWLES. ELECTRICAL SNOW MELTING HEATER.

APPLICATION FILED APR-J. IBIS Patented Oct 31,1916.

2 SHEETSSHEET I Suva dot Lje sse ,4J5aw/es J. A. BOWLES. ELEQTRICA L SNOW-MELT1NG HEATER.

APPLICATiON FILED APR.1.I915.

air/1 65 whim ewe o ike characters 053 refi ence designate 5; the chfierem; figures To 5122' wham- Be it known L citizen of the Uni Spokane, in

5 State of W Cf giirees mimcmm 01" pavament which slopes new and useful iaemi'iy guis'rhers 2., sidewall: be indisawtad 8. 1e Ema-st can tracks cmczlum 5%, and are dis'eosed centrally mini? m pavement or street strueu A 3 a1", iizdisaied m; 5, and sewar was 6 lead mmWa-rfiy to the sewr, shame eing shown ture vi the street pm" 05 my inventien is indicommistincticn is b v at 7 211161 is disposed Q1011; F5 ers which are m fume adjacan'i; $0 $119 gatizers S;

iatz'zer with respaci an the side- I fr'om the ca- @323? by snnw hie-rally towzar the a the b ficts of my invention to L to the snow '50 "'hab tha Water will devi s/a 0'3 11 manna? 5:0 melt water to dis My invention -11 mam s1; 9 dfisign'ai-es 10 designates, the 95 "WQLHSEEB Resig- 1e lid off cave? 12 screws Suitable a 1:; one m: Mi ven'hon so pawn 24 L1. vi-

snow med '12s, w eiect'rica'i cm iuc'hm spacel receptacles 'w Other feafiur-as tion will be men it J may ha infierposeii be- 0*? i Elm" Barman 01' 5119 100 co'kei is applied. and Walls and 11 are flange 15 an 01' T insuiafiin? material w 105 is mat: at if. tween the skewing i 15: ea

As ifiazstmmd, 1 c'lesignates an. ached posed in the tray 16 and are electrically connected in series by conductors 20 and 21. Each endmost coil 19 is connected by'conductors 22 and 23, extending through a conduit 24, to the coils of the next adjacent box.

A coupling 25, threaded into the side wall 10,

forms a mechanical connection between ad- 1o jacentreceptacles. The conduit 24: extends through the coupling 25 into the next adjacent receptacle. Each receptacle is provided on each side with a coupling, such as 25, and

the opposite end coil; is connected by conductors and 26 passing through a conduit 2'? which extends through coup ing 25.

The boxes, with their heating coils, will be connected in series and terminal conductors 22 and 23 will lead to a switch box 29. A. source of current 30 diagrammatically indicated in Fig. 2, will be" connected with each switch box to supply current for heating coils- 19 of the several heating units. The switch boxes may be disposed at the end of 25 each group of heating units it being understood that in practice the units are connected for limited lengths of road way so that in case of repairs, only a short section will be temporarily thrown out of operation.

By reason of the fact that the boxes are relatively small, and because they are embedded in-the roadway or pavement so that their topswill be flush with the latter, no

great'strain'will be at any time imposed on 343 any one box and yet I am able to get a practically continuous heated strip or a su* =ctently continuous heated strip so as to eiiiciently melt all of the snow justalong the gutter. It will thus be seen that by dispos- 40 mg the units in linear groups along a street,

the utmost economy can be efiected by reamnaof the fact that any cue group can be I connecting said coils in cut elf when the snow is complcwiy melted and the groups may be operated in accord ance with the progress made and in accord ance with the quantity of snow dumped or disposed adjacent the gutter.

While I have herein shown and described one specific form of my invention I do not wish to be limited thereto except for such limitations as the claim may import.

I claimz I In an electric. snow melting mechanism, snow melting means comprising a plurality of heating units in linear spaced relation along a roadway and each unit consisting of a metal box having a base and upright walls and provided with an upright lid supporting post and a supporting flange formed. on said walls and extending about the interior of said box, a lining of insulating material extending along and over said bottom and upwardly along the interior of said walls, a tray of insulating material disposed on said flange and being substantially co-extensive in area with respect to the horizontal cross section of said box, electrical heating coils disposed in said tray, electrical conductors series, electricalrsupply conductors leading through said'walls to and from end-most coils and extending through said bottom lining and throu h said tray, and a snow melting lid'of metal mounted on said walls andpost and closing said box and being in such close proximity to said coils as to be heated thereby, substantially as describe In testimony whereof I ailix my signature in presence of two witnesses.

I Jesse A. sous.

Witnesses:

E. SMITH,

EDNA Bnorans. 

